Replace marquee in test to make it deterministic.

Marquees cause visible state changes in the layout tree both because
they trigger extra layers and because the scroll offset is not well known.

Most often the LayoutTest framework captures marquees after the
shadow <div> has been created but before the layout engine has
reacted to the transformation commands and animation. But not always.

This groups the marquee tests in TestExpectations (they should be treated
as the same problem) and replaces one marquee with an equally good generic
element.

BUG=439478

Review URL: https://codereview.chromium.org/879603002

git-svn-id: svn://svn.chromium.org/blink/trunk@189015 bbb929c8-8fbe-4397-9dbb-9b2b20218538
3 files changed
tree: b517992cb8b64a68b4b2b0db51930db9d9086549
  1. third_party/